Film-holder



H. BLUM.

FILM HOLDER.

APPLICATION FILED JULY 30,1919.

1 329349. Patented Feb. 3, 1920.

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M O :1 IIIIHLAH INVENTQR Q 7 m $4M 1 KZM ATTORNEY HARRY BLUM, or NEW roan, N. Y.

FILM-HOLDER.

Specification of Letters Patent.

Patented Feb. 3, 1920.

Application filed July 30, 1919. Serial No. 314,284.

To all whom it may concern: 7

'Be it known that I, HARRY BLUM, a citizen of'the' United States, and a'resident of the city, county, and State of New York, have invented certain new and useful Improvements in Filnnflolders, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

The objects of the present invention are to provide a simple and efficient-device for holding photographic films in substantially straight and fiat condition, particularly during the developing and fixing process.

Briefly, the invention embodies a frame, channeled to receive and confine the edge portions of a film and provided preferably with frictional gripping means for yieldably retainingthefilm in position within the frame.

The various details of the invention and novel features of construction .will appear more fully as the specification-proceeds.

In the drawing accompanying this speci fication I have illustrated the invention embodied in one of its practical preferred forms, this with the understanding, however, that modifications may be made without departure from the true spirit and scope of the invention, as defined by the appended claims.

In said drawing- Figure 1 is a front or face view of the frame.

Fig. 2 is a vertical sectional view of the frame, taken substantially on the plane of line 22 of Fig. 1.

Fig. 3 is an end view of the frame.

Like characters of reference refer to corresponding parts in the several views.

5 designates the supporting cross-bar which is preferably made of such a length as to span the tank in which the film is to be treated. 6 and 7 are the side bars of the frame, usually of channel form, such as shown, to provide the upright grooves 8 for receiving and confining the side edges of the film. These side bars are connected together at the bottom by cross-bar 9, the same being shown in this instance as made of a plurality of strips providing between them a confining channel 10 for the lower'edge of the film.

The upper edge of the film is confined and supported by strips 11 connecting the side bars at a point near their upper ends and disposed at the opposite faces of the frame.

The grooved or channeled side bars are open at their upper ends as indicated at 12 to receive the film. The film is yieldably and releasably confined within the frame by the frictional gripping fingers 18 and 14, carried by the side bars of the frame and shown in this instance formed as integral tongues cut from the frontsides of the channel members and bent rearwardly or toward the backs of said channel members (see Fig. 2). These fingers thus yield readily to the film as it is inserted in the frame, but hold the edge portions of the film with sufficient force to prevent the film from shifting out of the frame.

Openings 15-are preferably provided in the backs of the side bars at points substantially beneath the gripping fingers 13 and 14 to al-' low free circulation of the liquid and to prevent the formation of white spots or blanks at these points. Also the strips forming the bottom bar of the frame may be arranged to provide the drainage openings 16 at the bottom of the frame, as indicated in Fig. 2.

In use the film is simply slipped fiatwise into the openings at 12 in the grooved side bars, said bars guiding the film straight downward between the confining strips 11 at the top and into engagement with the confining strips 9 at the bottom. With this construction therefore the film is held and confined at all four edges and hence cannot bend or sag to any appreciable degree and the edge portions of the film are prevented from dropping out of the confining grooves provided therefor. The frictional gripping fingers, which may be of a springy material, prevent the film from slipping out of the open side of the frame, but at the same time permit the film to be readily inserted in or removed from the frame.

lVhat I claim is:

1. A developing frame for photographic films comprising side bars grooved to receive the side edges of a film and open at one end to admit the film fiatwise into the guides thus provided, a connection between the opposite ends of the side bars forming a stop for the-forward edge of the film, and connecting means between the side bars near the open ends thereof and disposed at the opposite faces of the frame to thereby overlie and confine the rearmost portion of a film inserted in the frame.

2. A developing frame for photographic films comprising side bars grooved to receive the side edges of a film and open at one end for the admission of the film, confining strips connecting said bars near the open ends thereof and disposed at the opposite faces of the frame to overlie and confine the rearward edge portion of a film inserted in the frame, and a bar connecting the opposite end portions of the side bars and grooved to provide an edge confining stop for the forward edge of the film.

3. A support for photographic films comprising a substantially rectangular frame having side members grooved to receive the edge portions of the film and a frictional gripping finger carried by one of said grooved side members and arranged to frictionally engage the face of the film inserted in the frame.

A. A developing frame for photographic films comprising grooved side bars open at one end to receive the edge portions of a film, film confining cross bars connecting said side bars and frictional film'gripping fingers carried by the grooved side bars and disposed to frictionally engage the edge portions of a film insert-ed in the frame.

5. A developing frame for photographic films comprising channeled side bars, film confining crossars connecting said side bars and film gripping fingers cut from the side portions of said channeled bars and bent inwardly to frictionally engage the edge portions of a film inserted in the frame.

6. A developing frame for photographic films comprising channeled side bars, film confining cross-bars connecting said side bars and film gripping fingers cut from the side portions of said channeled bars and bent inwardly to frictionally engage the edge portions of a film inserted in the frame, said channeled bars having fluid circulating openings in the backs thereof substantially beneath the gripping fingers.

' films comprising a supporting bar, side bars dependent from said supporting bars and grooved to receive the edge portions of a film, the grooves in said bars being open at the upper end to admit the film, confining strips connecting said bars adjacent the open ends thereof and disposed to confine the opposite faces of a film inserted in the frame, a grooved cross-bar connecting the lower ends of the side bars and providing a confining stop for the lower edge of a film in the frame, and frictional gripping means carried by the side bars for frietionally engaging and' securing a film in position in the frame. 7

In witness whereof, I hereunto set my hand this 28th day of July, 1919.

HARRY BLUM. 

